Deuteronomy 12:18

לפני ה׳ [BUT THOU MUST EAT THEM] BEFORE THE LORD — i.e. within the walls of the city of Jerusalem. והלוי אשר בשעריך [BUT THOU MUST EAT THEM BEFORE THE LORD, THOU …] AND THE LEVITE THAT IS WITHIN THY GATES — If you have nought to give him that is due to him as his portion, as, for instance, the first tithe, give him the “tithe of the poor” (the tithe that replaces the “second tithe” in the 3rd and 6th year of the Sabbatical period); and if you have no “tithe of the poor”, invite him to your feast-offering meal (Sifrei Devarim 74:5).

כִּ֡י אִם־לִפְנֵי֩ יְהֹוָ֨ה אֱלֹהֶ֜יךָ תֹּאכְלֶ֗נּוּ בַּמָּקוֹם֙ אֲשֶׁ֨ר יִבְחַ֜ר יְהֹוָ֣ה אֱלֹהֶ֘יךָ֮ בּוֹ֒ אַתָּ֨ה וּבִנְךָ֤ וּבִתֶּ֙ךָ֙ וְעַבְדְּךָ֣ וַאֲמָתֶ֔ךָ וְהַלֵּוִ֖י אֲשֶׁ֣ר בִּשְׁעָרֶ֑יךָ וְשָׂמַחְתָּ֗ לִפְנֵי֙ יְהֹוָ֣ה אֱלֹהֶ֔יךָ בְּכֹ֖ל מִשְׁלַ֥ח יָדֶֽךָ׃

but thou must eat them before the Lord thy God in the place which the Lord thy God shall choose, thou, and thy son, and thy daughter, and thy manservant, and thy maidservant, and the Levite who is within thy gates: and thou shalt rejoice before the Lord thy God in all that to which thou puttest thy hand.